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Fencer Intel
critical 10.0

CVE-2011-2995 json

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 3.6.23 and 4.x through 6, Thunderbird before 7.0, and…

published 2011-09-29 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-2963

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.4%
EPSS 4.4% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 3.6.23 and 4.x through 6, Thunderbird before 7.0, and SeaMonkey before 2.4 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

Patch / fix

  • thunderbird RHEL 6 3.1.15-1.el6_1
  • firefox RHEL 4 3.6.23-1.el4
  • firefox RHEL 5 3.6.23-2.el5_7
  • firefox RHEL 6 3.6.23-2.el6_1
  • xulrunner RHEL 5 1.9.2.23-1.el5_7
  • xulrunner RHEL 6 1.9.2.23-1.el6_1.1

red hat advisories RHSA-2011:1342RHSA-2011:1341

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10071-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-2995 updated cvss 6.8

Mozilla: Miscellaneous memory safety hazards (MFSA 2011-36)

  • Red Hat Enterprise Linux 4 seamonkey, thunderbird Red Hat Enterprise Linux 5 thunderbird
    affected: no fix available
  • Red Hat Enterprise Linux (v. 5 server) firefox 3.6.23-2.el5_7, xulrunner 1.9.2.23-1.el5_7 Red Hat Enterprise Linux AS version 4 firefox 3.6.23-1.el4 Red Hat Enterprise Linux Desktop (v. 5 client) firefox 3.6.23-2.el5_7, xulrunner 1.9.2.23-1.el5_7 Red Hat Enterprise Linux Desktop version 4 firefox 3.6.23-1.el4 Red Hat Enterprise Linux ES version 4 firefox 3.6.23-1.el4 Red Hat Enterprise Linux Server (v. 6) firefox 3.6.23-2.el6_1, xulrunner 1.9.2.23-1.el6_1.1
    +3 more products
    Red Hat Enterprise Linux Server Optional (v. 6) thunderbird 3.1.15-1.el6_1, xulrunner 1.9.2.23-1.el6_1.1 Red Hat Enterprise Linux WS version 4 firefox 3.6.23-1.el4 Red Hat RHEL Desktop Workstation (v. 5 client) xulrunner 1.9.2.23-1.el5_7
    fixed: vendor fix RHSA-2011:1341

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.37% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.